#Script for AT91EB40a

if { [info exists CHIPNAME] } {	
   set  _CHIPNAME $CHIPNAME    
} else {	 
   set  _CHIPNAME at91eb40a
}

if { [info exists ENDIAN] } {	
   set  _ENDIAN $ENDIAN    
} else {	 
   set  _ENDIAN little
}

if { [info exists CPUTAPID ] } {
   set _CPUTAPID $CPUTAPID
} else {
  # force an error till we get a good number
   set _CPUTAPID 0xffffffff
}


#Atmel ties SRST & TRST together, at which point it makes
#no sense to use TRST, but use TMS instead.
#
#The annoying thing with tying SRST & TRST together is that
#there is no way to halt the CPU *before and during* the
#SRST reset, which means that the CPU will run a number
#of cycles before it can be halted(as much as milliseconds).
reset_config srst_only srst_pulls_trst
 
#jtag scan chain
#format L IRC IRCM IDCODE (Length, IR Capture, IR Capture Mask, IDCODE)
jtag newtap $_CHIPNAME cpu -irlen 4 -ircapture 0x1 -irmask 0xf -expected-id $_CPUTAPID

#target configuration
set _TARGETNAME [format "%s.cpu" $_CHIPNAME]
target create $_TARGETNAME arm7tdmi -endian $_ENDIAN -chain-position $_TARGETNAME -variant arm7tdmi-s_r4

# speed up memory downloads
arm7_9 fast_memory_access enable
arm7_9 dcc_downloads enable

#flash driver
flash bank ecosflash 0x01000000 0x200000 2 2 0 ecos/at91eb40a.elf

# required for usable performance. Used for lots of
# other things than flash programming.
$_TARGETNAME configure -work-area-virt 0 -work-area-phys 0x00030000 -work-area-size 0x10000 -work-area-backup 0

$_TARGETNAME configure -event reset-init {
	puts "Running reset init script for AT91EB40A"
	# Reset script for AT91EB40a
	reg cpsr 0x000000D3
	mww 0xFFE00020 0x1
	mww 0xFFE00024 0x00000000  
	mww 0xFFE00000 0x01002539 
	mww 0xFFFFF124 0xFFFFFFFF  
	mww 0xffff0010 0x100
	mww 0xffff0034 0x100
}